CN101624050A - Hybrid-power battery SOC self-adaptive control method - Google Patents
Hybrid-power battery SOC self-adaptive control method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000001172 regenerating effect Effects 0.000 claims abstract description 36
- 238000011084 recovery Methods 0.000 claims abstract description 5
- 238000010248 power generation Methods 0.000 claims description 18
- 230000003044 adaptive effect Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 3
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 4
- 238000010606 normalization Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to a hybrid-power battery SOC self-adaptive control method. SOC supplemented by regenerative braking recovery energy is distinguished from the energy recovered by motor generating mode through reasonably dividing a state of charge SOC section, wherein the energy recovered by motor generation is only used for efficiency auxiliary driving, so that the use of hybrid power energy is reasonably controlled, and the system efficiency is optimized.
Description
Technical field
The invention belongs to hybrid power SOC control field,, be specifically related to a kind of hybrid-power battery SOC self-adaptive control method.
Background technology
Along with present global warming phenomenon is on the rise, and more and more nervous contradiction between oil supply and demand, " environmental protection and energy-conservation ", " people, car, perfect naturally harmonious " become the public topic of automotive field already.
Hybrid vehicle is reasonably combined motor and engine drive system; bring into play motor-driven advantage and remedy engine-driven weakness; make driving engine remain on optimum condition work; can realize functions such as engine idle shutdown, assistive drive and regenerating braking energy recovery, but the energy management of hybrid power control is the difficult point of hybrid power control.It is the technical matters that has battery SOC difficult management in the hybrid power control in the prior art.
Summary of the invention
The objective of the invention is to the hybrid-power battery SOC operation interval is rationally divided, realize the restriction of hybrid-power battery SOC electrical machine working mode and operation torque.
Rationally divide by state-of-charge SOC is interval, the energy that SOC that the regenerative brake recuperated energy is additional and electric power generation pattern reclaim makes a distinction, wherein the energy of electric power generation recovery only is used for doing the efficient assistive drive, has reasonably controlled the hybrid power energy and has used, and has optimized system effectiveness; According to the life parameter SOL (state of life) of battery and health parameters SOH (stateof health) the automatic compensation SOC interval division of tabling look-up; According to battery SOC value more new motor assistive drive maximum permissible torque and motor regenerative brake maximum permissible torque automatically, it is interval to guarantee that the battery SOC operation interval uses rationally.
Concrete technical scheme is as follows:
A kind of hybrid-power battery SOC self-adaptive control method, adopt following steps:
(1) divides the battery SOC operation interval;
(2) determine electrical machine working mode;
(3) according to the residing operation interval of the state of SOC, the corresponding respectively mode of operation of also determining motor;
(4) the maximum moment of torsion that uses of the motor under the mode of operation of the motor of the corresponding different SOC operation intervals of adjustment.
The division of described SOC operation interval, it is according to the life parameter SOL and the health parameters SOH of the battery of measuring and look into known table and carry out automatic compensation.
Described electrical machine working mode is divided into four kinds, is respectively:
(a) performance assistive drive pattern, under this pattern, the output torque of motor is adjusted into the raising driving performance;
(b) efficient assistive drive pattern, under this pattern, the output torque of motor is adjusted into and improves car load efficient, makes engine operation in the economical consumption of fuel zone;
(c) power generation mode, under this pattern, motor keeps the battery SOC balance, thereby the car load electricity consumption is provided;
(d) regenerative brake pattern, under this pattern, motor reclaims the unnecessary kinetic energy of car load.
In the division of operation interval, the SOC that SOC that car load regenerative brake recuperated energy is additional and electric power generation pattern reclaim makes a distinction described in the step (1), and wherein, the energy that electric power generation reclaims only is used for doing the efficient assistive drive.
Described battery SOC operation interval is divided into four, is respectively:
(A1) interval one for forbidding the regenerative brake district, and it is charged to be 100% to one second high limit;
(A2) interval two is the higher district of SOC, and it is charged to be that one second height is limited to SOC control center value;
(A3) interval three is the low district of SOC, and it is charged to be SOC central value to one second lower bound;
(A4) interval four for forbidding the assistive drive district, and it is charged to be second lower bound to 0%.
The SOC height of described interval one (A1) is forbidden the regenerative brake of motor only allowing motor to carry out assistive drive.
The interior motor of described interval two (A2) can comprise the assistive drive of performance assistive drive and two kinds of electric models of efficient assistive drive, and should can carry out the regenerative brake recuperated energy in the interval.
The interior motor of described interval three (A3) can carry out efficient assistive drive, electric power generation and regenerative brake recuperated energy, and can only carry out the efficient assistive drive in this interval.
In this interval three (A3), be not used in and carry out the performance assistive drive by the SOC electric weight of electric power generation.
The interior battery SOC of described interval four (A4) is low, forbids that motor carries out assistive drive, only allows motor to generate electricity and the regenerative brake recuperated energy.
The division methods of described battery SOC operation interval is: SOC limit section value limit value is calculated, table look-up according to the life parameter SOL of battery and health parameters SOH and to obtain SOC and use the interval COEFFICIENT K derate that reduces, calculate: SOC first lower bound=SOC central value-first depth of discharge * Kderate, SOC first high limit=SOC central value+first depth of discharge * Kderate, SOC second lower bound=SOC central value-second depth of discharge * Kderate, SOC second high limit=SOC central value+second depth of discharge * Kderate, wherein SOC central value, first depth of discharge and second depth of discharge can be demarcated.
When battery SOC greater than the SOC central value, then assistive drive maximum permissible torque=motor maximum permissible torque carries out the assistive drive adaptive control; When SOC less than the SOC central value, the minimum moment of torsion that allows of regenerative brake maximum permissible torque=motor advances the regenerative brake adaptive control.
Description of drawings
Fig. 1 is a hybrid-power battery SOC interval division scheme drawing
Fig. 2 is the hybrid-power battery SOC self-adaptive control flow chart
The specific embodiment
Describe the present invention with reference to the accompanying drawings below, it is a kind of preferred embodiment in the numerous embodiments of the present invention.
Battery SOC energy management for convenience, present embodiment is divided into four kinds with electrical machine working mode:
Performance assistive drive pattern: purpose is to improve driving performance, makes 1.3 liters of driving engines have the driving of 1.6 liters of driving engines.
Efficient assistive drive pattern: purpose is to improve car load efficient, makes engine operation in the economical consumption of fuel zone as far as possible.
Power generation mode: purpose keeps macrocell SOC balance, and the car load electricity consumption is provided.
The regenerative brake pattern: purpose is to reclaim the unnecessary kinetic energy of car load.
Shown in figure one, general hybrid power is controlled four operation intervals of battery SOC:
Interval one, 100% to second height is limited to forbids the regenerative brake district, and SOC is very high in this interval, so can forbid the regenerative brake of motor, only allows motor to carry out assistive drive;
Interval two, second height is limited to SOC control center value and is the higher district of SOC, can carry out assistive drive at this zone motor, comprise two kinds of electric models of performance assistive drive and efficient assistive drive,, can carry out the regenerative brake recuperated energy in this zone simultaneously for many as far as possible recuperated energies;
Interval three, SOC central value are the low district of SOC to second lower bound, can carry out efficient assistive drive, electric power generation and regenerative brake recuperated energy at this zone motor, owing to replenish by electric power generation at this regional SOC electric weight majority, so can not use this energy to carry out the performance assistive drive, to prevent electric power generation → additional SOC → motor performance assistive drive → consumption SOC, be that motor electricity amount is used for the performance assistive drive again, the conversion of energy secondary reduces the energy service efficiency, therefore only carries out the efficient assistive drive in this zone;
The SOC of interval four, second lower bound to 0% is interval for forbidding the assistive drive district, and is very low at this zone battery SOC, carries out assistive drive so can forbid motor, only allows motor to generate electricity and the regenerative brake recuperated energy.
Battery SOC all can be controlled between second lower bound and the second high limit under the normal circumstances, to prevent the battery overshoot or to cross to put and reduce battery performance and service life.Just can occur when having only new battery just to use being operated in and forbid the regenerative brake district or forbid the assistive drive district.
Shown in figure two.
At first SOC limit section value limit value is calculated:
Table look-up according to battery status parameter S OH and SOL and to obtain SOC and use the interval COEFFICIENT K derate that reduces.
SOC first lower bound=SOC central value-first depth of discharge * Kderate
SOC first high limit=SOC central value+first depth of discharge * Kderate
SOC second lower bound=SOC central value-second depth of discharge * Kderate
SOC second high limit=SOC central value+second depth of discharge * Kderate
Wherein SOC central value, first depth of discharge and second depth of discharge can be demarcated.
If battery SOC is greater than the SOC central value, then assistive drive maximum permissible torque=motor maximum permissible torque carries out the assistive drive adaptive control then.If SOC is less than the SOC central value, the minimum moment of torsion that allows of regenerative brake maximum permissible torque=motor advances the regenerative brake adaptive control then.
The assistive drive adaptive control:
SOC＜SOC second lower bound (hard lower bound, about 40%) or accelerator open degree＜65% an output Kmot are 0.2;
If above-mentioned condition does not all satisfy, SOC＞SOC first lower bound (soft lower bound, about 50%) and accelerator open degree＞70%, then exporting Kmot is 1, is 0.2 (0.2 is a calibration value) otherwise continue output Kmot;
MotNormalisedSOC=(SOC central value-SOC actual value)/(SOC central value-(SOC first lower bound-(SOC first lower bound-SOC second lower bound) * Kmot))
Table look-up according to MotNormalisedSOC and to obtain normalized driving torque COEFFICIENT K Mot_Normalised_Torque.
Normalization method driving torque maxim=Tmax*KMot_Normalised_Torque
The regenerative brake adaptive control:
SOC＞SOC second height is limit (hard high limit, about 80%) or is not had brake, and then exporting Kreg is 0.2 (0.2 is a calibration value);
If above-mentioned condition does not all satisfy, brake signal is arranged, then exporting Kreg is 1;
RegNormalisedSOC=(SOC actual value-SOC central value)/(((the SOC second high limit-SOC first high limit) the * Kreg+SOC first high limit)-SOC central value)
Table look-up according to RegNormalisedSOC and to obtain normalized regenerative brake torque coefficient KReg_Normalised_Torque.
Normalization method regenerative brake moment of torsion minimum value=Tmin*K Reg_Normalised_Torque
The present invention rationally divides by SOC is interval, the energy that SOC that the regenerative brake recuperated energy is additional and electric power generation pattern reclaim makes a distinction, wherein the energy of electric power generation recovery only is used for doing the efficient assistive drive, has reasonably controlled the hybrid power energy and has used, and has optimized system effectiveness; According to the life parameter SOL (state of life) of battery and health parameters SOH (stateof health) the automatic compensation SOC interval division of tabling look-up; According to battery SOC value more new motor assistive drive maximum permissible torque and motor regenerative brake maximum permissible torque automatically, it is interval to guarantee that the battery SOC operation interval uses rationally.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (12)
1, a kind of hybrid-power battery SOC self-adaptive control method is characterized in that, adopts following steps:
(1) divides the battery SOC operation interval;
(2) determine electrical machine working mode;
(3) according to the residing operation interval of the state of SOC, the corresponding respectively mode of operation of also determining motor;
(4) the maximum moment of torsion that uses of the motor under the mode of operation of the motor of the corresponding different SOC operation intervals of adjustment.
2, hybrid-power battery SOC self-adaptive control method as claimed in claim 1 is characterized in that, the division of described SOC operation interval, and it is according to the life parameter SOL and the health parameters SOH of the battery of measuring and look into known table and carry out automatic compensation.
3, hybrid-power battery SOC self-adaptive control method as claimed in claim 1 or 2 is characterized in that, described electrical machine working mode is divided into four kinds, is respectively:
(a) performance assistive drive pattern, under this pattern, the output torque of motor is adjusted into the raising driving performance;
(b) efficient assistive drive pattern, under this pattern, the output torque of motor is adjusted into and improves car load efficient, makes engine operation in the economical consumption of fuel zone;
(c) power generation mode, under this pattern, motor keeps the battery SOC balance, thereby the car load electricity consumption is provided;
(d) regenerative brake pattern, under this pattern, motor reclaims the unnecessary kinetic energy of car load.
4, hybrid-power battery SOC self-adaptive control method as claimed in claim 3, it is characterized in that, described in the step (1) in the division of operation interval, the SOC that SOC that car load regenerative brake recuperated energy is additional and electric power generation pattern reclaim makes a distinction, wherein, the energy of electric power generation recovery only is used for doing the efficient assistive drive.
5, as claim 1, each described hybrid-power battery SOC self-adaptive control method in 2,4 is characterized in that described battery SOC operation interval is divided into four, is respectively:
(A1) interval one for forbidding the regenerative brake district, and it is charged to be 100% to one second high limit;
(A2) interval two is the higher district of SOC, and it is charged to be that one second height is limited to SOC control center value;
(A3) interval three is the low district of SOC, and it is charged to be SOC central value to one second lower bound;
(A4) interval four for forbidding the assistive drive district, and it is charged to be second lower bound to 0%.
6, hybrid-power battery SOC self-adaptive control method as claimed in claim 5 is characterized in that, the SOC of described interval (A1) is higher, forbids the regenerative brake of motor, only allows motor to carry out assistive drive.
7, hybrid-power battery SOC self-adaptive control method as claimed in claim 5, it is characterized in that, the interior motor of described interval two (A2) can comprise the assistive drive of performance assistive drive and two kinds of electric models of efficient assistive drive, and should can carry out the regenerative brake recuperated energy in the interval.
8, hybrid-power battery SOC self-adaptive control method as claimed in claim 5, it is characterized in that, the interior motor of described interval three (A3) can carry out efficient assistive drive, electric power generation and regenerative brake recuperated energy, and can only carry out the efficient assistive drive in this interval.
9, hybrid-power battery SOC self-adaptive control method as claimed in claim 8 is characterized in that, is not used in by the SOC electric weight of electric power generation in this interval three (A3) and carries out the performance assistive drive.
10, hybrid-power battery SOC self-adaptive control method as claimed in claim 5 is characterized in that, the interior battery SOC of described interval four (A4) is lower, forbids that motor carries out assistive drive, only allows motor to generate electricity and the regenerative brake recuperated energy.
11, as claim 2, each described hybrid-power battery SOC self-adaptive control method among the 5-10, it is characterized in that, the division methods of described battery SOC operation interval is: SOC limit section value limit value is calculated, table look-up according to the life parameter SOL of battery and health parameters SOH and to obtain SOC and use the interval COEFFICIENT K derate that reduces, calculate: SOC first lower bound=SOC central value-first depth of discharge * Kderate, SOC first high limit=SOC central value+first depth of discharge * Kderate, SOC second lower bound=SOC central value-second depth of discharge * Kderate, SOC second high limit=SOC central value+second depth of discharge * Kderate, wherein SOC central value, first depth of discharge and second depth of discharge can be demarcated.
12, hybrid-power battery SOC self-adaptive control method as claimed in claim 11 is characterized in that, when battery SOC greater than the SOC central value, then assistive drive maximum permissible torque=motor maximum permissible torque carries out the assistive drive adaptive control; When SOC less than the SOC central value, the minimum moment of torsion that allows of regenerative brake maximum permissible torque=motor advances the regenerative brake adaptive control.
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